Preparation And Controlled Release Mechanism Of Starch-based Slow-release Fragrance

Octenyl succinic anhydride(OSA)modified starch and maltodextrin are important starch-based materials and are widely used in various industries.Fragrances,as an important type of additives,have the effects of improving the bad odor and giving the product special aroma.However,due to the volatility and instability of the fragrance,its effective application in products is limited.Therefore,this topic takes OSA modified starch and maltodextrin as the wall material and oil-soluble rose fragrance as the core material.Through a single factor experiment,the wall material compounding ratio,the amount of wall material added,the amount of core material added,the preparation temperature and the homogenization time.The impact on the loading of starch-based rose sustained-release fragrance was determined to be the best preparation process conditions: wall material compounding ratio(OSA starch / maltodextrin)2: 1,wall material addition amount 35%,core material addition amount 30%,The preparation temperature was 60℃ and the homogenization time was 20 minutes.Thus,a safe and environmentally friendly starch-based sustained-release fragrance with controlled-release effect was prepared,and the residual rate and release time during the release of characteristic aroma substances in the sustained-release fragrance were fitted by Avrami’s equation to obtain the release of esters.The fastest,followed by alcohols,and the slowest release of phenols,laid the theoretical foundation for the preparation of rose fragrance with better sustained release.In addition,through the preparation of OSA starch / maltodextrin supramolecular system to study the self-assembly mechanism of the two,looking for factors that affect the morphological transformation of the supramolecular system.The results show that the supramolecular system can self-assemble to form vesicles when the OSA starch ratio is low,the wall material is added in a small amount,the system is acidic or neutral,and the system salt concentration is low,otherwise the micelles are formed.These conclusions provide new ideas and new insights for embedding complex and unstable fragrances with starch-based materials.